Inner tire.



H. M. HENNING.

INNER TIRE.

APPLICATION FILED 1AN.30.19I8.

1,298,945, Patnted Apr. 1, 1919..

' point HEEisY f' lli. HEKNING, F HINfiEY, CALIFORNIA.

KNEE? S ecifieation 01 Letters Patent.

Fatented Apr. 1, 19519.

2. plieation filed January 30, 1918. Serial No. 214,5 i4.

1 '0 all whom may concern:

Be it known that l, Henna? M. Hnnmns, a citizen of the United States residing at l-linhley in the county of San Bernardino and State of California, have invented new T mer Tires, of is specification. to make an inner tire to be inserted into casing and take the place of the pneumatic inner tube.

The is a fragmentary cross-sectional perspective showing an inner tire embodying the principles oi my invention in a casing upon a rim for use.

The inner tire consists of the supporting member 1 and the tread member 2.

The supporting member 1 is a solid elastic composition of rubber and canvas molded into the desired size and shape. In crosssection the support 1 is bounded by the lines 4 and 5 adapted to lit the inner faces 6 and '7 of the casing 8, the line 9 connecting the inner ends of'the lines t and 5, the curved lines 1- and 11 extending outer ends the lines 4 and 5, and the straight lines 12 and 13 extending inwardl from the inner ends of the lines and ll. and meeting at the axial center 14 of the cascavity. In side elevation the supporting member 1 is circular and endless. The line 9 may be flat and lit against the outer face of the tire rirl 15. The lines 4 and '5 extend from the ends of the line 9 and fit the inner W-hi ch the lily ob ect faces of the casing to the points 16 and 17.,

said points 16 and 1? being substantially on a horizontal line With the center point 14:" The lines it; andil are arcs of a circle and extend to the p nts 18 and 19 which are in. vertical planes substantially half-Way between the points 16 and 14 and 17 and 14., respectively, and the straight lines 12 and 13 extend from the points 18 and 19 to the cen ter point it. The points 16 and 17 are sub 'stantially in line with the edges 20 and 21 of the rubber tread 22 of the casing.

in crosssection the tread member 2 is bounded by the straight lines 28 and 24 em tending radially from the point 14 to the poi? nd 26 upon the inner feces ot the cas and the circular line 2'? connect .1 1 ends the lines 23 and the center point- 14-. :al plane in line with the 1 and the casing at the l extends sixty degrees each The tread member center inwardly from the- 2 is soft rubber molded and moderately vulcanized so as to make the tread 2 more elastie than the tread support 1. The lines 23 and 24 of the tread normally contact with the lines -12 and.13 of the tread support from the point 14 to the points 18 and 19, said points 18 and 19 being substantially halfway from the point it to the points 25 and 26 and the contacting portion of the tread is a blunt Wedge resting in the Wide if-shaped groove formed by the lines 12 and 13.

The tread may be inserted into the casing in 'a manner similar to the insertion of an inner tube and then the tread support may be inserted intothe casing against thetread. Then the tire may be applied to the rim 15 and applied to a Wheel 29 and is ready for use. The Wheel 29, the rim15, and the casing 8 may be any of the Well known constructions the object being to make an inner tire for universal use any place that an inner tube can be used.

When a Wheel has been equipped with a casing carrying my inner tire, pressure upon the ball 30 of the tread 22 of the casing, as when the Wheel is running upon the ground, will press the wedge of the tread 2 into the groove of the tread support 1 and expand the tread support laterally and bring the outer portions of the lines 23 and 24 into contact with the lines 10 and 11 more or less, according to the load. The triangular v spaces-31 and 32 between the lines 10 and ll, the outer halves of the lines 23 and 24, and the corresponding faces of the casing cavity, Willsimply be filled With air at or near atmospheric pressure. The curved outer face of the tread 2 between the points and 26 will yield more or less to the unevenness of the road and to the pressure exerted by the load and the tendency all the time will be to return the casing 8 to its normal shape.

The inner tire thus constructed may be made to fit any casing cavity and it is thought that it should be made to fit smoothly and closely in the cavity. The enact i'i'ietes and bounds of the angles, straight lines, and Eurves may be varied, at least to spirit of my invention.

it is desired to hold the inner tire from creeping on the rim and in the casing, a bolt 33 is prepared rigid with a disk 34 upon its tinner end and screw-threads 35 upon its Y placed upon a rim the bolt 33 is outer end. The bolt is placed in the mold and and the tread support 1 is cast around the bolt with the bolt protruding like an air tube protruding from an inner tube. Then when the casing carrying the inner tire is placed through the air valve openin in the rim and through the felly, a nut 36 is screwed down upon the threads 35 against the felly, and a cap 37 screwed upon the end of the bolt to make an appearance of an' air valve- The bolt 33 passing through the rim and felly will hold the tire from' creepin upon the rim and felly and will present the appearance of a tire having an air valve.

I claim:

1. An inner tire comprising a tread having a curved outer face adapted to fit the inner face of a casing and extending substan I tially sixty degrees each way from a vertical central plane and having fiat faces extending radially inwardly from the outer edges of the curved face and meeting at the axial; center, and a tread support having a V- shaped annular groove fitting the inner halves of the flat facesand having curved faces extending outwardly from, the flat faces and from the groove and having curved faces adapted to fit the inner faces of the ing radially inwardly from the outer edges of the curved face and meeting at theaxial center, and a tread support having a V-shaped annular groove fitting the inner halves of the flat faces and having curved faces extending outwardly from the fiat faces and from the groove; the outer ends of the curved faces being on a line with the axial center; and having second curved faces extending from the outer edges of the first curved faces and adapted to fit the inner face offthe casin and having a face connecting the lower efges of the second curved faces and-adapted to fit the outer face of a-tire rim upon which the casing is mounted.

In testimony whereof I have signed my name to this specification.

HENRY M. HENNING.

g and extending sub 

